| abstract |
[Problem] To provide a novel compound that exhibits an agonistic effect on dopamine D 2 receptors. n [Solution] The present invention provides a compound represented by the general formula (I): n n n n n n n n n n in which R 1 is C 1-6 alkyl or the like; R 2 is hydrogen or the like; R 3 and R 4 are each hydrogen, C 1-6 alkyl, R 10 R 11 N—C 1-6 alkyl, aralkyl, or the like; R 5 and R 6 are hydrogen or the like; and R 7 is hydrogen or the like, or a pharmaceutically acceptable salt thereof, a pharmaceutical compositions containing same and uses for said compound/salt and composition. The compounds of the present invention exhibit potent dopamine D 2 receptor simulating activities and thus are useful as a treating or preventing agent for Parkinson's disease and the like. |